Knife for mowers and reapers



D. F. SUTTON. Knives for Mowers and Reapers.

No. 226,129 Patented Mar. 30, 1880.

aENVfiNTOR/ 22 ATTORNEY WITNESSES IJ'Nrrnn STATES DELAY F. SUTTON, OF ROCHESTER, NEW YORK.

KNIFE FOR MOWERS AND REAPERS.

SPECIFICATION forming part of Letters Patent No. 226,129, dated March 30, 1880.

Application filed September 6, 1879.

To all whom it may concern:

Be it known that I, DELAY F. SUTTON, of Rochester, in the county of Monroe and State of New York, have invented anew and valuable Improvement in Knives for Mowers and Reapers; and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being had to the annexed drawings, making a part of this specification, and to the letters and figures of reference marked thereon.

Figure 1 of the drawings is a representa tion of a top view of a knife detached. Fig. 2 is a top view of the cutter-bar, showing the attachment of the knives; and Figs. 3, 4, and 5 are detail sections.

This invention has relation to improvements in reaper and mower knives.

The object of the invention is mainly to devise means whereby the knives may be readily secured to their carrier when worn out or otherwise injured; and the nature of the invention consists in acarrier-barhaving a dovetailedrecess in its face, a longitudinal groove near its rear edge,'and spaced bevel-headed spurs in front of said groove, of sectional knives having depressed studs designed to be received in said groove, key-hole slots adapted to receive in their larger ends the said studs, and a wedge driven into the interval between the last knife and the end of said dovetail recess, as will be hereinafter more fully set forth.

In the annexed drawings, the letter A designates the carrier-bar of the knives, having in its face a depression, a, one end'of which, at least, is oblique to the length of the bar and undercut, so as to form a double dovetail, as shown in Figs. 2 and at. This bar has near its rear edge a longitudinal groove, a, extending from the oblique wall to the wall of the recess at the other end of said bar. It has also in front of said groove a number of bevel-headed spurs, 1), two of which are appropriated to each section of the knives.

The knives indicated by the letter A are of the usual form, being of the general form of a triangle with a rectangular base. They are each provided with two, or, if there be more than two bevel-headed spurs to each knife, an equal number of keyhole slots, 0, the larger ends of which freely receive the ends of the spurs, and the smaller prolongations of which are beveled to correspond with the spurs aforesaid.

Each of the knives is additionally provided with two or more projections, c, on its under side, that are formed out of its body by means of a punch of proper shape, while the said knife is hot and untempered. These spurs or teats are in line with each other, and are of a shape to fit snugly in the groove to aforesaid.

The knives are passed onto the carrier-bar by bringing the larger end of the key-hole slot over the spurs, causing the latter to enter the same, and then moving the knives laterally until the said spurs enter the beveled reduced portion of said -slots. The knives are passed on successively until the bar is filled, with the exception of an interval near the oblique undercut shoulder 00. In this interval is forced a wedge, d, having a beveled edge corresponding to that of the oblique shoulder aforesaid, and held against displacement usually by a set-screw.

The wedge jams the edges of the bases of the knives closely together, the bevel-headed spurs hold them against vertical displacement, and the spurs or teats projecting from the under sides of said knives and engaging the groove a in the bar prevent backward displacement and relieve the beveled spurs of undue strain.

By this means the knives are very securely attached to the bar; but when dulled, broken, or otherwise injured can be very readily removed and duplicates substituted therefor.

What I claim as new, and desire to secure by Letters Patent, is

In a cutter-bar for reapers and mowers, the combination of the bar A, having a recess in its top, with an oblique undercut shoulder, as, the bevel-headed spurs b, and the longitudinal groove 01., the knives A, having key-hole slots each with a reduced beveled end correspondin g to said spurs, and the studs ion the under side of the said knives, and engaging groove a, substantially as specified.

In testimony that I claim the above I have hereunto subscribed my name in the presence of two witnesses.

DELAY F. SUTTON.

Witnesses:

G. B. YOUNGS, CHAUNGEY NASH. 

